Scraper blade mounting



June 1955 A. J. WERNER ETAL 2,711,597

SCRAPER BLADE MOUNTING Filed March 10, 1950 3nnentors AMA/w 1-5. Wa /me 964 460 1/. mw/mz (Ittoruegs United States Patent SCRAPER BLADE MOUNTING Arnold J. Werner, Elm Grove, and Adolph A. Wagner, Milwaukee, Wis., assignors to Wagner Iron Works, Milwaukee, Wis., a corporation of Wisconsin Application March 10, 1950, Serial No. 148,964

2 Claims. (Cl. 37-42) This invention relates to improvements in plow and scraper blade mountings.

'It is the principal object of the invention to provide improved plow and scraper blade mountings wherein the blade or moldboard is adjustably supported above ground level on convexly bottomed shoes. vision of convexly bottomed shoes permits the blade to assume a variety of angular positions respecting the direction of vehicle travel without interfering with the skid or support function of the shoe.

Another object of the invention is to provide a pivotal mounting for the blade upon' which the balde may be rotated to selected angular positions respectiing the direction of vehicle travel. In this connection it is an object of the inventionto provide a pivotal mounting particularly adapted for interconnection with the articu- .l'.

late tractor dipper stick framesof the type disclosed in our co-peding application filed March 10, .1950, Serial No. 148,961 and now Patent No. 2,672,994.

A further object of the invention is to provide the blade with a yieldable mounting upon which the blade is per- The prodipper stick and a scraper blade pivotally attached thereto. i

Fig. 2 is a cross sectional view taken along the line 2--2 of Fig. 1.

Fig. 3 is a plan view of a scraper blade showing a novel mounting therefor including a pivotal connection between the blade and the vericle dipper stick.

Fig. 4 is a cross sectional view taken along the lines 4-4 of Fig. 3.

Fig. 5 is a rear perspective view of a modified form of the blade shown in Figs. 3 and 4, the modification comprising a pivot upon which the blade is pivoted in a plane normal to the ground and a yieldable connection between the dipper stick and blade offset from said pivot.

Fig. 6 is a detail view of the yieldable blade connection.

Fig. 7 is a rear perspective view of a V-shaped snow plow provided with convex bottomed skid shoes disposed in a triangular pattern corresponding to the blade outline. I

Fig. 8 is a vertical cross sectional view taken through the plow of Fig.7.

Although the plows and blades to be described herein have application to any type of power driven vehicle, they have particular utility when used as front end at- 'ice tachments to the tractor dipper sticks described in our co-pending application aforesaid. These dipper sticks are illustrated only fragmentarily herein, and comprise laterally spaced longitudinally extending lever arms 10 (see Figs. 1 and 2).

The dipper stick further comprises a cross member 11 between the arms 10. In one embodiment of the invention, and as best shown in Figs. 1 and 2, the cross member 11 supports a tubular sleeve 12 in which a retractible catch or lock rod 13 is reciprocably mounted. A scraper blade 14 may be mounted on the lever arm ends upon the brackets 16 and transverse pivot pins and is further provided with a centrally disposed rearwardly extending strap 19 which is apertured at 20 at several points along the strap 19 to selectively receive the lock rod 13. By changing the rod from one aperture 20 to another the inclination of the blade 14 respecting the ground may be varied.

Lockrod 13 may be withdrawn from a .strap aperture 20 by means of a linkage system operatively controlled from the drivers seat of the tractor. A control rod 21 extends from the drivers seat to a pivotal connection to a lever 22 which is fulcrumed upon a brack et 23 fixed to the cross member 11. Intermediate its ends the lever 22 is pivotally connected at 24 to the lock 13. Withdrawal of the lock rod from the blade strap aperture will dump the contents of the blade when the dipper stick arms 10 are raised.

An important feature of the invention is the provision for the adjustable support of the blade 14 at desired levels above the ground. For this purpose convexly bottomed skid shoes 25 are disposed at each side of the blade upon the brackets 26. The blades shown in Figs. 3, 4, and 5 are similarly provided with convexly bottomed skid shoes 25. As best shown in Fig. 5 the mounting bracket 26 comprises a sleeve portion 27 having vertically spaced apertures 29. The shoe 25 is provided with a mounting stem 31 which is slidable in the bracket sleeve 27 and is also provided with spaced apertures 31 which align with the sleeve aperture .29 to selectively receive a removable pin 32 or the like by which the height of the blade 14 respecting the ground may be adjusted.

The blade 14, in the embodiments of the invention 1.; shown in Figs. 3 to 5, is mounted upon the dipper stick lever arms 10 of the tractor in a somewhat diiferent manner than that of the embodiment of Fig. 1. As best shown in Fig. 3 the blade 14 may be pivoted about a pin 36 to a variety of angular positions respecting the path of vehicle travel. The pivotal mounting comprises a plate 33 fixed to the dipper stick and in face contact with a plate 34 connected to the blade. Plate 34 is arcuately apertured at 35, and is provided with the offset pivot 36 about which the blade may be rotated. The plate 33 is provided with an arm 37 overlying the plate 33 to receive therebetween the blade plate 34. Arm 37 is provided with an aperture 38 disposed in the same are as the plate apertures 35. When one of the apertures and the arm aperture 38 are mutually aligned a pin 41 may be passed through the aligned apertures to fix the blade in selected angular position. In this manner the pivotally related plates 33 and 34 constitute a turntable on which the blade is pivotally mounted.

The convexly bottomed shoes 25 serve effectively as support skids regardless of the angular positioning of the blade upon its pivotal mounting, the convex skid riding over the surface of the ground equally well in all directions and at various angles.

The dipper stick plate 33 is detachably rigidly connected to the lever arms 10 by means of the paired rear wardly extending arms 42 whichare apertured at 43 to receive the transverse rod 44 which has bearings in the 36. Pivot 48 is journaled in the depending brackets 49 of the plate 34 and pivotally supports the blade 14 on brackets 50. The pivotal movement of the blade on the pin 48 is in a plane normal to the ground to permit the blade to .yield if the forward'edge 47 of the blade strikes a non yielding obstruction. The blade is biased to upstanding position by a yieldable connection laterally otfset from the pivot 48. The yieldable connection comprises a spring 51 which is seated between the overlapping ends 52 and 53 of the slidably related members 54 and 55.

The members 54 and 55 are respectively connected to the blade brackets 50 and to the blade plate 34. The mounting for the member 54 includes a transverse spacing element 56 and retaining bolt 57. The mounting for member 55 comprises an upstanding bracket 34' fixed to the plate 34 and to which member 55 is pivotally connected at 55. The spring 51 acts in compression and biases the blade to upright position, but is yieldable to permit the blade to tilt upon its pivot 48 when the blade tip strikes a non-yielding obstruction in its path of travel.

In Figs. 7 and 8 a V-shaped snow plow having converging blades or moldboards 61 is illustrated. The rear ends of the moldboards 61 are bridged by the inwardly extending brackets 62 which are continued to mutual connection by a top cross member 63 and bottom cross member 64. The bottom edges of the moldboards are 3 provided with an angle bracket 65 having a top flange 66. The top flange 66 provides a support at the tip of the V-shaped plow for a rectangular sleeve 67 on bracket 70. The sleeve 67 slidably receives the stem 68 of a convexly bottomed skid shoe 69. As in the case of the shoes of the blades shown in Figs. 35, the stem 68 and sleeve 67 are respectively provided with the complementary aligned apertures 72 and 73 respectively, and with a removable pin 74 registering with said apertures in selected aligned positions in order that the height of the plow above the ground be readily adjustable.

The bridge brackets 62 and-cross members 63 and 64 are provided with a mounting plate 75 which provides a basefor similar shoe mounting sleeves 67, which receive stems 68 of the rear skid shoes 69 in adjustable manner as aforesaid. 7

As best shown in Fig. 7 the convexly bottomed skid shoes 6 for the V -shaped snow plow are arranged in a triangular pattern, one-of the shoes being disposedat the tip of the plow and the other being disposed near the rear ends of the respective moldboards of the plow. In i this manner the plow is entirely self-supporting upon the shoes 69. Theplow is'pivotally connected to the spaced leverparrns 10 of the tractor or vehicle dipper stick by meansof a pintle 82. Pintle 82 passes through the aligned aperture of the dipper stick arm ends and the aligned apertures 79 of the paired brackets 76 and 77 which project from a fixed connection with the plate 75 at either side of the plow.

A rearwardlyiprojecting guide yoke 78 is also provided at each of the paired brackets 76 and 77.. The yoke 78 includes'a cross-piece 81 which acts as a contact point against the undersurfaces of the dipper stick arms 10 which are fulcrurned on the pivot-82. The plow will tend to tilt forwardly on the pivot 82 when the arms 10 are raised. However, contact of the yoke cross piece 81 against the arms will limit such pivotal movement and require the plow to remain horizontally oriented when lifted from the ground.

We claim:

1. The combination with a boom comprising spaced 4 lever arms intermediate their length, of a blade and blade turntable carried by said boom, said turntable comprising a relatively stationary normally horizontal first plate having means detachably connecting said plate to the ends of said boom arms and having arms extending rearwardly beyond said means and along said boom arms, said plate arms having rearwardly open forks engaged with the cross bar of the boom whereby to rigidly but detachably brace the said first plate with respect to the boom, said turntable further comprising an upright first pivot pin, a second plate having bearing support on the first plate and having a central bearing pivotally engaged with said pin for oscillation of said plate th'ereabout, an arm connected to said first plate beyond the margin of said second plate and extending over said second plate in spaced relation to said first and second plates, said last arm being provided with an aperture over the margin of said second plate, said margin being provided with a series of apertures arcuately arranged about said pivot pin, and a locking pin engageable through the aperture in said last arm and selectively with the apertures in the margin of the second plate whereby 'to lock said second plate adjustably with respect to said first plate, said second plate being provided with a second pivot pin at a right angle to said first pivot pin, said blade being provided with a bearing on which said blade is mounted to said second plate by said second pivot pin for oscillation in a plane transverse to the plane of turntable rotation, and spring means connecting said second plate and blade to bias said blade to upright position about said second pivot but yieldable on impact of said blade with an unyielding obstruction to permit the blade to oscillate about said second pivot to pass said obstruction, said second plate being provided with a first bracket extending upwardly therefrom and a second bracket extending downwardly therefrom, said blade being provided with a re'arwardly extending third bracket parallel to said second bracket and in face sliding contact therewith, said second and third brackets being provided with aligned holes providing the bearings for said second pivot, said spring means comprising an anchor mounted on said third bracket, a rod connected to said anchor and extending along said third bracket in substantially parallel relation thereto, said rod having an end collar, a compression springcoiled about said rod and seated against said collar, an arm connected to said second bracket and extending in spaced parallel relation to said third bracket and rod, said'arrn having its end turned toward said rod andprovided with an aperture through which said rod extends from said anchor, said end provided a seat for the spring opposite the collar whereby to compress said spring between said end and collar when the blade oscillates forwardly about said second pivot in passing an obstruction.

2. In a device of the character described a blade and blade turntable mounting comprising a relatively stationary normally horizontal first plate, an upright first pivot pin=on said plate, a second plate in bearing engagement on the first plate and having a central bearing pivotally engaged with said-pin for oscillation of said second plate thereabout, an arm connected to said first plate beyond the margin of said second plate and extending over said second plate in spaced relation to said first and second plates, said arm being provided with an aperture over the margin of said second plate, said margin being provided with a series of apertures arcuately arranged about said pivot pin, and a locking pin engageable through the aperture in said arm and selectively with the apertures in the margin of the second plate whereby to lock said second plate adjustably with respect to said first plate, said second plate being provided with a second pivot pin at a right angle to said first pivot pin, said blade being provided with a bearing on which said blade is mounted to said second plate by said second pivot pin for oscillation in -a plane transverse to the plane of turntable rotation, said second plate being provided with a first bracket extending'upwardly therefrom and a second bracket extending down- 5 wardly therefrom, said blade being provided with a rearwardly extending third bracket parallel to said second bracket and in face sliding contact therewith, said second and third brackets being provided with aligned holes providing the bearings for said second pivot, an anchor mounted on said third bracket, a rod connected to said anchor and extending along said third bracket in substantially parallel relation thereto, said rod having an end collar, a compression spring coiled about said rod and seated against said collar, an arm connected to said second bracket and extending in spaced parallel relation to said third bracket and rod, said arm having its end turned toward said rod and provided with an aperture through which said rod extends from said anchor, said end providing a seat for the spring opposite the collar whereby to compress said spring between said end and collar when the blade oscillates forwardly about said second pivot, whereby said blade may pass an unyielding obstruction.

References Cited in the file of this patent UNITED STATES PATENTS 6 Toy et a1 Nov. 13, 1923 Rittenhouse Nov. 10, 1925 Sargent July 6, 1926 Wertley May 14, 1929 Smith Oct. 15, 1929 Choate Dec. 10, 1929 Schnell June 10, 1930 Abbe Dec. 30, 1930 Wooldridge June 7, 1932 Meyer Aug. 1, 1933 Henry Sept. 22, 1936 Coates Oct. 13, 1936 Abbe Sept. 28, 1937 Keeler May 20, 1941 Arps Jan. 5, 1943' Maxim et a1. May 4, 1948 Henry Feb. 1, 1949 Upton Nov. 22, 1949 Arps Mar. 3, 1953 

